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Antidepressants and anti-psychotic medications can disrupt your cycle and cause you to skip periods or get them more frequently. âMany of these medications elevate a pituitary hormone called prolactin, which can alter other hormones in your body that regulate your cycle,â Minkin says.
The net effect of these steps is to convert light energy into chemical energy in the form of ATP and NADPH. The ATP and NADPH from the light-dependent reactions are used to make sugars in the next stage of photosynthesis, the Calvin cycle. In another form of the light reactions, called cyclic photophosphorylation, electrons follow a different, circular path and only ATP (no NADPH) is produced.